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import multiprocessing
import os.path
import sys
from unittest import mock
import pytest
import pre_commit.constants as C
from pre_commit import parse_shebang
from pre_commit.languages import helpers
from pre_commit.prefix import Prefix
from pre_commit.util import CalledProcessError
from testing.auto_namedtuple import auto_namedtuple
@pytest.fixture
def find_exe_mck():
with mock.patch.object(parse_shebang, 'find_executable') as mck:
yield mck
@pytest.fixture
def homedir_mck():
def fake_expanduser(pth):
assert pth == '~'
return os.path.normpath('/home/me')
with mock.patch.object(os.path, 'expanduser', fake_expanduser):
yield
def test_exe_exists_does_not_exist(find_exe_mck, homedir_mck):
find_exe_mck.return_value = None
assert helpers.exe_exists('ruby') is False
def test_exe_exists_exists(find_exe_mck, homedir_mck):
find_exe_mck.return_value = os.path.normpath('/usr/bin/ruby')
assert helpers.exe_exists('ruby') is True
def test_exe_exists_false_if_shim(find_exe_mck, homedir_mck):
find_exe_mck.return_value = os.path.normpath('/foo/shims/ruby')
assert helpers.exe_exists('ruby') is False
def test_exe_exists_false_if_homedir(find_exe_mck, homedir_mck):
find_exe_mck.return_value = os.path.normpath('/home/me/somedir/ruby')
assert helpers.exe_exists('ruby') is False
def test_exe_exists_commonpath_raises_ValueError(find_exe_mck, homedir_mck):
find_exe_mck.return_value = os.path.normpath('/usr/bin/ruby')
with mock.patch.object(os.path, 'commonpath', side_effect=ValueError):
assert helpers.exe_exists('ruby') is True
def test_exe_exists_true_when_homedir_is_slash(find_exe_mck):
find_exe_mck.return_value = os.path.normpath('/usr/bin/ruby')
with mock.patch.object(os.path, 'expanduser', return_value=os.sep):
assert helpers.exe_exists('ruby') is True
def test_basic_get_default_version():
assert helpers.basic_get_default_version() == C.DEFAULT
def test_basic_healthy():
assert helpers.basic_healthy(Prefix('.'), 'default') is True
def test_failed_setup_command_does_not_unicode_error():
script = (
'import sys\n'
"getattr(sys.stderr, 'buffer', sys.stderr).write(b'\\x81\\xfe')\n"
'exit(1)\n'
)
# an assertion that this does not raise `UnicodeError`
with pytest.raises(CalledProcessError):
helpers.run_setup_cmd(Prefix('.'), (sys.executable, '-c', script))
def test_assert_no_additional_deps():
with pytest.raises(AssertionError) as excinfo:
helpers.assert_no_additional_deps('lang', ['hmmm'])
msg, = excinfo.value.args
assert msg == (
'For now, pre-commit does not support additional_dependencies for lang'
)
SERIAL_FALSE = auto_namedtuple(require_serial=False)
SERIAL_TRUE = auto_namedtuple(require_serial=True)
def test_target_concurrency_normal():
with mock.patch.object(multiprocessing, 'cpu_count', return_value=123):
with mock.patch.dict(os.environ, {}, clear=True):
assert helpers.target_concurrency(SERIAL_FALSE) == 123
def test_target_concurrency_cpu_count_require_serial_true():
with mock.patch.dict(os.environ, {}, clear=True):
assert helpers.target_concurrency(SERIAL_TRUE) == 1
def test_target_concurrency_testing_env_var():
with mock.patch.dict(
os.environ, {'PRE_COMMIT_NO_CONCURRENCY': '1'}, clear=True,
):
assert helpers.target_concurrency(SERIAL_FALSE) == 1
def test_target_concurrency_on_travis():
with mock.patch.dict(os.environ, {'TRAVIS': '1'}, clear=True):
assert helpers.target_concurrency(SERIAL_FALSE) == 2
def test_target_concurrency_cpu_count_not_implemented():
with mock.patch.object(
multiprocessing, 'cpu_count', side_effect=NotImplementedError,
):
with mock.patch.dict(os.environ, {}, clear=True):
assert helpers.target_concurrency(SERIAL_FALSE) == 1
def test_shuffled_is_deterministic():
seq = [str(i) for i in range(10)]
expected = ['4', '0', '5', '1', '8', '6', '2', '3', '7', '9']
assert helpers._shuffled(seq) == expected
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